3991124341 has 4 divisors (see below), whose sum is σ = 3991276300. Its totient is φ = 3990972384.

The previous prime is 3991124339. The next prime is 3991124353. The reversal of 3991124341 is 1434211993.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3631870225 + 359254116 = 60265^2 + 18954^2 .

It is a 3-Lehmer number, since φ(3991124341) divides (3991124341-1)³.

It is a cyclic number.

It is not a de Polignac number, because 3991124341 - 2¹ = 3991124339 is a prime.

It is a deceptive number, since it divides R_3991124340.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3991124341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991124311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25326 + ... + 92863.

It is an arithmetic number, because the mean of its divisors is an integer number (997819075).

It is a Poulet number, since it divides 2^3991124340-1.

Almost surely, 2^3991124341 is an apocalyptic number.

3991124341 is the 33769-th nonagonal number.

It is an amenable number.

3991124341 is a deficient number, since it is larger than the sum of its proper divisors (151959).

3991124341 is a wasteful number, since it uses less digits than its factorization.

3991124341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151958.

The product of its digits is 23328, while the sum is 37.

The square root of 3991124341 is about 63175.3459903466. The cubic root of 3991124341 is about 1586.2260799488.

The spelling of 3991124341 in words is "three billion, nine hundred ninety-one million, one hundred twenty-four thousand, three hundred forty-one".